To get the most accurate reading:
• Be early for your appointment.
• Take something to read or do, and relax.
• Don’t drink coffee or fizzy or energy drinks with caffeine 30 – 60 minutes before testing.
• Don’t smoke for 30 - 60 minutes before the test.
• Don’t do vigorous exercise beforehand.
• If you’re over 60 or have diabetes your test will sometimes be repeated after standing for about two minutes. This is to see if you have postural hypotension, when standing up abruptly causes a sharp fall in blood pressure.
Read more on Hypertension:
Hypertension: why you should never skip your medication
The role your diet plays in managing hypertension
Salt may be bad for more than your blood pressure